出售二手综合测试仪CMD55CMD55联系人：陈S13088816091在线***:513606225CMD55产品特点：·是测量G***及G***1800移动电话的紧缩式单元·通过RS232，IEC/IEEE远控·前面板有多功能连接器·话音编码器/***器可被集成·可选择安培表和伏特表·高敏感度二级RF输入·可改进为G***、G***1800及G***1900测试CharacteristicsTheCMD52isacompactunitfortestingG***900mobiles.TheCMD55isfurthermorecapableoftestingG***1800(formerlynamedPCNorDCS1800)G***1900(formerlynamedPCSDCS1900)mobilephones.Bothmodelsaref***ourablypricedcombine***alldimensi***withhighmeasurementaccuracyspeed.Thetestersrangeofcapabilitiesincludesallsignalling,generatormeasurementfuncti***requiredforverifyingthecorrectoperationoftheDUT(DeviceUnderTest).Thankstoitsfastgo/nogotestsaccurateanalysisusingoptionalextensi***,CMD52CMD55areequallywellsuitedforR&D,productionandhigh-endsedonthewide-rangeknow-howofRohde&Schwarzindigitalradiocommunicationtesting,whichnotleastwasobtainedindevelopingtype-approvaltestsystemssuchastheG***900G***1800systemsimulators,bothCMDmodelsaretop-gradetestersforpresentfuturemeasurementapplicati***.TestcapabilitiesTotestmobilephones,theCMDsimulatesaG***900,18001900basestation.OneofthetwoRFsynthesizers***ailableforthispurposedeliversacontinuousBCCHsignalwhiletheotheroneprovidesall8timeslotsforTCHsignals.Themajortestfuncti***are:MobilesynchronizationLocationupdateIncomingcallsetupOutgoingcallsetupMobilepowerlevelcontrolHandover(channelchange,timeslotchange)PeakpowermeasurementHighdynamicrangeburstanalyzer(optionCMD-B4CMD-B42)SpectrumduetoSwitchingmeasurement(optionCMD-B4CMD–B43)SpectrumduetoModulationmeasurement(optionCMD-B4CMD–B43TimingAdvancemeasurementSACCHmeasurement(egRxLev,RxQual,powerlevel)EchotestCallclearingbymobilephoneCallclearingbyCMDDCcurrent/voltagemeasurementsPhasefrequencyerrormeasurement(optionCMD-B4)Measurementofpowerrampingasafunctionoftime(optionCMD-B4)Bit-errorrate(BER)FastBERmeasurement(optionCMD-B4)OperationOperationoftheCMDisextremelyuser-friendlyrequiresnodetailedG***/PCNknowledge.Thehigh-contrast,backlitLCDprovidedwithsoftkeysonbothsidesallowsconvenientcallupoftestroutinesundermenucontrol.Variousnetwork-specificparametersarepresetpermitdirecttestingwithoutanyoperatorcontrol.Inaddition,itisofcoursepossibletoallparametersindividuallyintheconfigurationmenus.AutotestTheautotestfunctionenablescompletemeasurementroutinestobestartedatakeystrokewithoutanyfurtherinterventionbytheoperatorbeingrequired.ThetestresultsintabularformaredisplayedonthemotecontrolTheCMDisremote-controlledviatheRS-232IEEE/IEC-businterfaceusingSCPI-compatiblecommands.Intheremote-controlmodetheCMDisdesignedforfastspeedtoyieldhighthroughputsinhotestTheechotestallowsveryrapidgo/nogoanalysiscoveringallessentialpartsofthemobile.Wo***spokenintothemicrophoneofthemobilearesenttotheCMD,storedinbuffermemorysentbacktothephone.InthiswayitispossibletocheckthewholesignalpathfromthemicrophoneviatheRFtran***ittersection,RFreceiversection,modulator,demodulator,signallingsection,speechcoder/decoder,analogaudiocomponentsthroughtotheloudspeaker.TestinghandheldsInadditiontothenormalRFinput/output,theCMDhasahigh-sensitivityinputahigh-leveloutputwhichenabletestsonmodulesonhandheldswithbuilt-inantennabyusingcouplersliketheCMD-Z10.ModuletestingFaultlocalizationinmobiletelephonesrequiresvariousmeasurementfuncti***thatcanalsobeusedwithoutsignallingsothatdefectiveunitscanbetesteddowntomodularlevel.ThebasicmodelofCMDalreadyprovidessomeofthesefuncti***,egsignalgenerationwithwithoutmodulationorpowermeasurements,otherfuncti***being***ailableasoptionalextensi***.)